package com.aier.common.common;

import javax.crypto.Cipher;
import javax.crypto.spec.IvParameterSpec;
import javax.crypto.spec.SecretKeySpec;


public class DES {
    private static byte[] iv = {1, 2, Constant.num_3, Constant.num_4, Constant.num_5, Constant.num_6, Constant.num_7, Constant.num_8};  
	  
    public static String encryptDES(String encryptString, String encryptKey)  
        throws Exception {  
        IvParameterSpec zeroIv = new IvParameterSpec(iv);  
        SecretKeySpec key = new SecretKeySpec(encryptKey.getBytes(), "DES");  
        Cipher cipher = Cipher.getInstance("DES/CBC/PKCS5Padding");  
        cipher.init(Cipher.ENCRYPT_MODE, key, zeroIv);  
        byte[] encryptedData = cipher.doFinal(encryptString.getBytes());  
        return Base64.encode(encryptedData);  
    }  
  
    public static String decryptDES(String decryptString, String decryptKey)  
        throws Exception {  
        byte[] byteMi = Base64.decode(decryptString);  
        IvParameterSpec zeroIv = new IvParameterSpec(iv);  
        SecretKeySpec key = new SecretKeySpec(decryptKey.getBytes(), "DES");  
        Cipher cipher = Cipher.getInstance("DES/CBC/PKCS5Padding");  
        cipher.init(Cipher.DECRYPT_MODE, key, zeroIv);  
        byte[] decryptedData = cipher.doFinal(byteMi);  
  
        return new String(decryptedData);  
    } 

}
